import React, {Component} from 'react';
import {withRouter} from "react-router-dom";

class Header extends Component {

    back = () => {
        this.props.history.goBack();
    }
    forward = () => {
        this.props.history.goForward();
    }

    go = () => {
        this.props.history.go(-2);
    }

    render() {
        return (
            <div className="page-header">
                <h2>React Router Demo</h2>
                <button onClick={this.back}>回退</button>
                <button onClick={this.forward}>前进</button>
                <button onClick={this.go}>go</button>
            </div>
        );
    }
}
//withRouter可以加工一般组件，让一般组件具备由路由组件所特有的api,withRouter的返回值是一个新组件
export default withRouter(Header);